just to chime in here, its simple physics & generally accepted fact that 2 stroke engines run hotter with a lean mixture, thats everything from an RC car to a Motocross bike!


got you a link to an online guide to tuning that might help answer a couple of questions you might have
its not in my words but on a quick look through it appears to be mainly sound advice

take a peep [link=http://www.*********.org/cars_eng-tuning.htm]HERE[/link]